INDOLI ZINE DERIVATIVES AND THEIR USE AS CRTH2 ANTAGONISTS

摘要

Compounds of formula (I) are ligands of the CRTH2 receptor and are useful in the treatment of respiratory disease: Formula (I) wherein R₁, R₂, R₃ and R₄ each independently are hydrogen, C₁C₆alkyl, fully or partially fluorinated C₁C₆alkyl, halo, -S(O)_nR₁₀, -SO₂N(R₁₀)₂, -N(R₁₀)₂, -C(O)N(R₁₀)₂, -NR₁₀C(O)R₉, -CO₂R₁₀, -C(O)R₉, -NO₂, -CN or -OR₁₁; wherein each R₉ is independently C₁C₆alkyl, aryl, heteroaryl; R₁₀ is independently hydrogen, C₁C₆alkyl, aryl, or heteroaryl; R₁₁ is hydrogen, C₁C₆alkyl, fully or partially fluorinated C₁C₆alkyl or a group -SO₂R₉; n is 0, 1 or 2; R5 is C₁C₆alkyl, fully or partially fluorinated C₁C₆alkyl , C₁C₆alkenyl , C₁C₆alkynyl, optionally substituted aryl, or optionally substituted heteroaryl; R₆ is hydrogen, C₁C₆alkyl or fully or partially fluorinated C₁C₆alkyl ; R₇ and R₈ are independently hydrogen or C₁C₆alkyl, or R₇ and R₈ together with the atom to which they are attached form a cycloalkyl group; and X is -CHR₆-, -S(O)_n-, -NR₆SO₂- or -SO₂NR₆- wherein n is 0, 1 or 2.